16789880664 has 128 divisors (see below), whose sum is σ = 47130336000. Its totient is φ = 5537947392.

The previous prime is 16789880659. The next prime is 16789880669. The reversal of 16789880664 is 46608898761.

It is an interprime number because it is at equal distance from previous prime (16789880659) and next prime (16789880669).

It is a super-2 number, since 2×16789880664² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16789880669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8775772 + ... + 8777684.

It is an arithmetic number, because the mean of its divisors is an integer number (368205750).

Almost surely, 2^16789880664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16789880664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23565168000).

16789880664 is an abundant number, since it is smaller than the sum of its proper divisors (30340455336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16789880664 is a wasteful number, since it uses less digits than its factorization.

16789880664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334 (or 2324 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 63.

The spelling of 16789880664 in words is "sixteen billion, seven hundred eighty-nine million, eight hundred eighty thousand, six hundred sixty-four".